Truma CP plus User manual

Operating instructions Page 2
To be kept in the vehicle!
Truma CP plus

2
Truma CP plus control panel
Symbols used
The appliance must only be installed and repaired by an
expert.
Symbol indicates a possible hazard.
Note containing information and tips.
Observe the ESD regulations! Electrostatic charg-
ing can cause destruction of the electronics. Ensure
that potential compensation is present before touching the
electronics.
Table of Contents
Operating instructions
Intended use ....................................................................... 3
Safety instructions ............................................................. 3
Important notes .................................................................. 3
Display and control elements ........................................... 4
Rotary push button ................................................................ 4
Back button ........................................................................... 4
Initial start-up ...................................................................... 5
Start-up ................................................................................ 5
Functions ............................................................................. 5
Switching on and off ............................................................. 5
APP mode in conjunction with an iNet Box .......................... 6
Change room temperature .................................................... 6
Change hot water level .......................................................... 7
Select energy source ............................................................. 8
Select fan level ...................................................................... 9
Set time switch .................................................................... 10
Switch lighting on/off. ......................................................... 12
Set time ............................................................................... 12
Service menu .................................................................... 13
Special displays ................................................................ 15
230 V mains voltage available ............................................. 15
Truma App with iNet Box .................................................... 15
Infrared (IR) remote control (air conditioning system) ........ 15
External control panel (CI-BUS) ........................................... 15
Warning ............................................................................. 16
Fault .................................................................................... 16
Technical data ................................................................... 17
Maintenance ..................................................................... 17
Disposal ............................................................................. 17
Declaration of conformity ............................................... 17
Troubleshooting guide (Combi gas heating system)... 18
Troubleshooting guide (Combi Diesel heating system)... 19
Troubleshooting guide (air conditioning system) ....... 20

3
Intended use
The Truma CP plus control panel1is used to control and monitor
a Combi CPplus ready heater and/or a Truma air conditioning
system. The Truma CPplus1serves as an interface for operating
connected appliances via Truma App and iNet Box.
The following air conditioning systems can be operated with
the Truma CPplus1:
– Saphir compact2
– Saphir comfort RC
– Aventa eco
– Aventa comfort3
The Truma CPplus1 is intended for installation in caravans and
motor homes. Installation in boats is not permitted.
The Truma CP plus control panel can be retrofitted in older
heating systems. The heater electronics must be replaced
(by Truma Service) to do this.
Safety instructions
– Operate the Truma CP plus control panel only if it is a tech-
nically perfect condition.
– Repairs must be carried out immediately. Only carry out
repairs yourself if the solution is described in the trouble-
shooting guide of this manual.
– Do not carry out any repair work or modifications on the
Truma CP plus control panel!
– A defective Truma CP plus control panel may only be re-
paired by the manufacturer or the manufacturer’s service
department.
Operating instructions – Never use LP gas appliances when refuelling, in multi-storey
car parks, in garages, or on ferries. Switch off the LPgas
appliance on the Truma CP plus control panel and make
sure that the LP gas appliance definitely cannot be switched
on via the Truma App.
Important notes
– If the power supply to the system has been interrupted, the
time / time switch must be reset.
– If a new or replacement appliance (heater, air conditioning
system or iNet Box) is connected to the bus system, the
procedure described in “Initial start-up” must be repeated.
– The ZUCB time switch can no longer be used when the
Combi CPplus ready heater is connected to the TrumaCPplus
control panel.
Air conditioning systems – shared use of IR remote con-
trol and Truma CP plus control panel
– Even after connecting the Truma CP plus control panel, the
IR remote control is available for controlling the air condition-
ing system. The Truma CP plus control panel recognises all
settings that are made using the IR remote control on the air
conditioning system. The IR remote control only transmits
the settings that are shown in its display (no bidirectional
communication).
– Only the time switch of the Truma CP plus control panel
may be used to clearly define the start and end time of a
required period.
1and Truma CPplus CI-BUS for CI-BUS – not retrofittable.
2From serial number 23091001. In combination with a
Combi CPplus ready heater, a “control panel cable coupling” is
essential between the air conditioning system and the heater.
The “control panel cable coupling” (part no. 40090-69300) can
be ordered separately. Not in conjunction with a TG1000 sinus
power inverter
3From serial number 24084022.

4
Display and control elements
2
3
5
4
8
6
7
9
1
1 = Display
2 = Status bar
3 = Menu bar (upper)
4 = Menu bar (lower)
5 = 230 V mains supply indicator (power)
6 = Time switch display
7 = Settings / Values
8 = Rotary push button
9 = Back button
The menus can be selected in lines (3 + 4) and settings can be
made using the rotary push button (8). The display (1) has an
illuminated background. The Back button (9) can be used to
return from a menu.
Rotary push button
Setpoints and parameters can be selected, modified and saved
by tapping on it using the rotary push button (8). Selected
menu items flash.
+
Rotate clockwise
– Menu is run through from left to right.
– Increase values (+).
-
Rotate anticlockwise
– Menu is run through from right to left.
– Decrease values (-).
Tapping
– Accept (save) a selected value.
– Select a menu item, switch to setting
level.
Long press
– Main switch function ON/OFF.
– If a iNet Box was recognised while
searching for an appliance, the func-
tion of the rotary push button changes
(see “APP mode in conjunction with
an iNet Box” on page 6).
Back button
Pressing the Back button (9) returns you from a menu and
discards settings. This means that the previous values are
retained.

5
Initial start-up
In order to perform the initial start-up, the following steps are
required:
– Switch on power supply.
12 V direct voltage for CP plus control panel and Combi and
230 V mains voltage for air conditioning systems and Combi E.
– Start the search of the appliances under menu item
“Service menu” –> “RESET” –> “PR SET”.
After confirmation,Truma CP plus control panel initialises it-
self. “INIT ..” appears on the display while this is in progress.
This stores in the Truma CP plus control panel the appliances
that have been found.
Start-up
Start / Stand-by screen
After connecting the Truma CP plus control panel to the power
supply, a start screen is displayed after a few seconds.
– The display changes between the time and the set
room temperature.
– Special displays on command via Truma App, IR re-
mote control of the air conditioning system or CI-BUS
(see “Special displays” on page 15).
– After a repair / retrofit, the procedure described under
“Initial start-up” must be repeated.
Functions
The functions in the menu bars (3, 4) of the Truma CP plus con-
trol panel are selectable in any order. The operating parameters
are shown on the status bar (2) and on the displays (5, 6).
Select setting level
– Tap rotary push button.
The display shows the setting level. The first icon flashes.
Switching on and off
Switching on
– Tap rotary push button.
– Previously set values / operating parameters are reac-
tivated after switching on.
Switching off
– Press rotary push button for longer than 4 seconds.
– “APP”1appears in the display after 2 seconds.
– “OFF” appears after another 2 seconds.
– The Truma CP plus control panel deactivation procedure
can be delayed by several minutes because of internal
heating or air conditioning system after-runs.
1Only in conjunction with an iNet Box.

6
APP mode in conjunction with an iNet Box
Operation
In APP mode, the connected appliances and the Truma CPplus
control panel go into Stand-by.
– No heating function.
– No hot water heating.
– No operation of the air conditioning system.
– No time switch function in the Truma CP plus control panel.
– The CP plus control panel remains ready to receive com-
mands via the Truma app or the infrared remote control of
the air conditioning system. This means that the connected
appliances remain operable via the Truma App or the air
conditioning system’s infrared remote control.
Activating APP mode
– Press the rotary push button for about 2 seconds until
“APP” appears in the display.
– Release the rotary push button.
– The previously set values are saved.
Ending APP mode
APP mode is ended
– when new values are determined via the Truma App or the
air conditioning system’s infrared remote control.
– when the Truma CP plus control panel is woken by pressing
the rotary push button. The previously saved values are then
accepted for renewed operation.
Change room temperature
– Select icon in menu bar (3) with rotary push button.
– Change by tapping in the setting level.
– Depending on the appliance that is connected, select between
heating system (HEATER) or air conditioning system (AC) or
automatic air conditioning system1(AUTO) using the rotary
push button.
– Tap rotary push button to confirm selection.
– Select desired temperature with rotary push button.
– Tap the rotary push button to confirm the value.
2
3
c fda b e
Heater (HEATER)
settable temperature range 5 – 30 °C (1 °C steps)
a = Heater2– Heater is switched on.
Air conditioning system (AC)
settable temperature range 16 – 31 °C (1 °C steps)
b = COOL * –Air conditioning system is switched on
c = AUTO –Air conditioning system is set to automatic
d = HOT –Air conditioning system is in heating mode.
e = VENT – Air conditioning system is in air circulation mode
Quick temperature change using rotary push button poss-
ible (in Stand-by screen).
1Automatic air conditioning system (AUTO) only if “ACC” has
been activated in the service menu (see “Service menu” on
page 13). This is deactivated at the factory.
2Symbol flashes until the desired room temperature is reached.

7
Automatic air-conditioning system (AUTO)
Settable temperature range 18 – 25 °C (1 °C steps)
Automatic switchover between heater and air conditioning
system for an approximately constant temperature on the
inside.
f = AUTO – Automatic air-conditioning system is activated
Requirements for operation with automatic air-conditioning
system:
– The heater and air conditioning system must be connected.
– Automatic air-conditioning system “ACC” must be activated
in the service menu (see “Service menu” on page 13).
Change hot water level
Select icon in menu bar (3) with rotary push button.
– Change by tapping in the setting level.
– Select desired level with rotary push button.
– Tap the rotary push button to confirm the value.
2
3
a b c d
– = OFF – Hot water generator is switched off.
a = Boiler1– Hot water generator is switched on.
b = eco2– Hot water temperature 40°C
c = hot – Hot water temperature 60°C
d = boost1,3 – Targeted, rapid heating of boiler contents
(Boiler priority) for a maximum time window
of 40minutes. Then the water temperature is
kept at the higher level for two post-heating
cycles (about 62°C) – not Combi Diesel. After
reaching the water temperature, heating of the
room continues.
1This symbol flashes until the required water temperature has
been reached.
2A hot water temperature can only be maintained with combined
room and water heating for a limited time at 40°C. Not available
for the Australian variants.
3Not available with Combi Diesel.

8
Select energy source
– Select icon in menu bar (3) with rotary push button.
– Change by tapping in the setting level.
– Select desired energy source with rotary push button.
– Tap the rotary push button to confirm the value.
2
3
a b c de
Icon Operating
mode
Energy mode
a Gas / Fuel Gas2/ Diesel2
b MIX 11Electric (900 W) + Gas2/ Diesel2
c MIX 21Electric (1800 W) + Gas2/ Diesel2
d EL 11Electric (900 W)
e EL 21Electric (1800 W)
As soon as the heater is switched on (room temperature, hot
water level active), the status line shows the energy type selec-
ted in the previous heating procedure. The factory setting is
gas / diesel.
Special features in mixed mode
– Interruption of the mains voltage 230 V:
The heating system switches automatically into gas and
diesel mode. As soon as the 230 V power supply has been
restored, the heating system automatically switches back to
mixed mode.
– Fault in combustion procedure (e.g. lack of fuel).
Combi Gas The heating system switches automatically
into electrical mode. For the heater to operate
in mixed mode again, the cause of the fault
must be remedied and acknowledged on the
Truma CP plus control panel. See “Fault” on
page 16.
Combi Diesel The heating system goes to fault. For the heater
to operate in mixed mode again, the cause of
the fault must be remedied and acknowledged
on the Truma CP plus control panel. Switch to
“Electrical” energy type if the fault is persistent.
Special features in electric mode
– If the 230 V power supply is interrupted and the 12 V supply
is switched on, an fault code is shown on the display.
– When the 230 V power supply has been restored, the heater
is automatically started with the existing settings. The fault
code goes off.
1Mixed and electric mode. Only possible with heaters that have
electric heating elements e. g. Combi E CPplus ready.
2Power for gas / diesel, see operating instructions for the corre-
sponding heater.

9
Select fan level
With connected heating / air conditioning system
– Select icon in menu bar (3) with rotary push button.
– Change by tapping in the setting level.
– Select desired fan level with rotary push button.
– Tap the rotary push button to confirm the value.
2
3
a b c d e f
Heater (HEATER)
Icon Operating
mode
Description
– OFF Fan is switched off.
(only selectable if no appliance
is in operation).
a VENT1Circulated air, when no ap-
pliance is in operation and the
hot water generator is switched
off. 10speed settings available.
b ECO Low fan level
c HIGH2High fan level
d BOOST Rapid room heating
Available if the difference be-
tween the selected and the actual
room temperature is >10°C
1. Can lead to additional motor wear depending on frequency of use.
2. Fan level “HIGH” results in higher power consumption, higher
noise level and increased motor wear.
As soon as the heater is switched on (room temperature,
hot water level selected) the status bar (2) displays the fan
level that was selected during the previous heating procedure.
The factory setting is “ECO”.
Air conditioning system (AC)
Icon Operating
mode
Description
– OFF Fan is switched off
(only selectable if no appliance
is in operation).
a – –
bLOW Low fan level
c MID Medium fan level
d HIGH High fan level
e NIGHT Ultra-quiet fan operation
fAUTO Automatic fan level selection.
Cannot be changed in AUTO
mode.
Automatic air-conditioning system (AUTO)
Not possible to select the fan level with the automatic air con-
ditioning system.
– The fan level of the air conditioning system is determined
automatically.
– Only “ECO” is available for heaters.

10
Set time switch
Danger of toxic exhaust fumes.
The activated time switch switches on the heater even when
the vehicle is parked. The heater’s exhaust can be toxic in
closed spaces (e.g. garages, workshops).
If the vehicle is parked in closed rooms:
– Shut off the fuel supply (gas or diesel) to the heater.
– Deactivate the time switch of the Truma CP plus control
panel (OFF).
– Switch off the heater on the Truma CP plus control panel.
– When air conditioning systems are being operated, the
time switch of the Truma CP plus control panel must
only be used to clearly define the start and end time
for a required period of time.
– If the time switch has been activated (ON), the deacti-
vate time switch menu is displayed first (OFF).
– Select icon in menu bar (4) with rotary push button.
– Change by tapping in the setting level.
Enter start time
– Set the hours then the minutes with the rotary push button.
24h mode 12h mode
hot hot
= a. m.
= p. m.
Entering the end time
– Set the hours then the minutes with the rotary push button.
24h mode 12h mode
hot
= a. m.
= p. m.
hot
If the start/end point was exceeded during entry, the op-
erating parameters are not taken into consideration until
the next start/end point has been reached. Until then, the op-
erating parameters that have been set outside the time switch
remain valid.

11
Set room temperature
– Select the heater, air conditioning system or AUTO using
the rotary push button, depending on the appliance that is
connected.
– Tap rotary push button to confirm selection.
– Select required room temperature with rotary push button.
– Tap the rotary push button to confirm the value.
hot
Set hot water level
– Select required hot water level with rotary push button.
– Tap the rotary push button to confirm the value.
hot
Select energy source
– Select required energy source with rotary push button.
– Tap the rotary push button to confirm the value.
hot
The select energy type menu is displayed if a heating
system with electric heating elements is connected.
Select fan level
– Select desired fan level with rotary push button.
– Tap the rotary push button to confirm the value.
hot
The Select fan level menu is only available if the heater /
hot water level has been set. Not available with automatic
air conditioning system AUTO.
Activate time switch (ON)
– Activate time switch with rotary push button (ON).
– Tap the rotary push button to confirm the value.
2
hot
– The time switch remains active until it is deactivated
(OFF), even for several days.
– If the time switch is programmed and active, the time
switch icon flashes.

12
Deactivate time switch (OFF)
– Change by tapping in the setting level.
– Deactivate time switch with rotary push button (OFF).
– Tap the rotary push button to confirm the value.
hot
Switch lighting on/off.
Available when air conditioning system is connected
Aventa comfort or
Aventa eco
– Select icon in menu bar (4) with rotary push button.
– Change by tapping in the setting level.
– Select required function with rotary push button.
1 – 5 – Switch lighting on.
Brightness selectable in 5 levels.
OFF – Switch lighting off.
– Tap the rotary push button to confirm the value.
4
Set time
Display, 24h mode Display, 12h mode
hot
4
hot
= a. m.
= p. m.
4
– With the rotary push button (8), select the “Set time“ sym-
bol in the menu bar (4).
The hour display flashes.
– Set the hours with rotary push button (8).
– The minutes display flashes when the rotary push button (8)
is tapped again.
– Set the minutes with rotary push button (8).
– Tap the rotary push button (8) to confirm the value.

13
Service menu
1. Calibrating the room temperature sensor of the
heater (OFFSET)
The room temperature sensor of the heater can be individu-
ally adjusted to the sensor’s installation situation. The setting
can be made in increments of 0.5 °C within the range of
0°Cto-5 °C.
hot Example:
Set room temperature 23 °C;
OFFSET = -1 °C;
– Setpoint value for heater = 22 °C
Presetting: 0°C (Celsius).
2. AC SET1,2
The sensed room temperature can – during operation of the
automatic air conditioning system – be perceived differently
during cooling than during heating. “AC SET” is used to set an
offset between cooling and heating. The setting can be made
in increments of 0.5°C within the range of 0°Cto+5°C.
hot Example:
Set room temperature 23 °C;
AC SET = 2 °C
– Setpoint value for air conditioning
system = 25 °C
Presetting: +1°C (Celsius).
3. ACC1
The automatic air conditioning system function AUTO is acti-
vated or blocked with “ACC”.
ON – The automatic air conditioning system function
AUTO is activated. Automatic air conditioning
system function AUTO can be selected in the
Room temperature menu.
– “AC SET” appears in the Service menu.
OFF – The automatic air conditioning system function
AUTO is blocked.
hot
Presetting: OFF
The function of the Truma automatic air conditioning sys-
tem depends on proper installation. Your Truma dealer/
partner would be pleased to advise you whether your vehicle
is suitable.
Requirements for the automatic air conditioning system func-
tioning as expected:
1.The air conditioning system and heater cover the entire
area of the vehicle that is supposed to be automatically air
conditioned.
2.The room temperature sensor of the heater is the lead
sensor of the automatic air conditioning system and must
therefore be in a suitable location, i.e.
– in the area in which the required room temperature
should be reached.
– if possible not influenced by the outside temperature and
sunlight.
1Only available if the air conditioning system and heater are connected.
2Only available if ACC is set to “ON”.

14
– not near to warm air ducts, cold air ducts or other sources
of heat.
– warm or cold air from the air outlets must not flow
against the room temperature sensor. particular attention
must be paid to this when adjusting the air throttles on
Aventa air conditioning systems.
– with good circulation and not on the vehicle ceiling.
Truma dealers / Truma partners are trained in correctly install-
ing the automatic air conditioning system. You can find our
dealers / Truma partners at www.truma.com.
4. °C / °F temperature display
Select the temperature display °C (Celsius) or °F (Fahrenheit).
hot
Presetting: °C (Celsius).
5. Changing the background lighting
Change the background lighting of the Truma CP plus control
panel in 10 levels.
hot
6. 12h / 24h mode
Display time in 12h (a. m., p. m.) / 24h mode.
hot
Presetting: 24h mode.
7. Change language
Select the desired language (German, English, French, Italian).
hot
Presetting: English
8. Showing the version number
Display version number of heater, air conditioning system,
Truma CP plus control panel or iNetBox.
hot
Example:
H 1.20.01 –> H = appliance; 1.20.01 =
version number
Appliance
C = Truma CP plus control panel
C = Truma CP plus control panel
CI-BUS
A = Air conditioning system
H = Heater
T = Truma iNet Box

15
9. Presetting (RESET)
The reset function resets the Truma CP plus control panel back to
the factory setting. All settings will be deleted. Newly connected
appliances are recognised and saved in the TrumaCPplus con-
trol panel.
– Switch on the power supply
12 V direct voltage for CP plus control panel and Combi and
230 V mains voltage for air conditioning systems and Combi E.
Perform Reset
– Select “RESET” with the rotary push button (8).
– Tap on the rotary push button (8)
– “PR SET” appears in the display.
– Tap the rotary push button (8) to confirm.
hot
After confirmation, the Truma CP plus control panel initialises
itself.
“INIT..” appears on the display while this is in progress.
Special displays
230 V mains voltage available
The icon signals that 230 V mains power supply is available.
hot
Symbol appears only in combination with a heater which
contains electrical heating elements for electrical mode.
Truma App with iNet Box
When a command is sent via the Truma APP of a mobile ter-
minal device, “APP” appears in the display.
Infrared (IR) remote control (air conditioning
system)
When a command is sent via the infrared remote control of
the air conditioning system, “IR” appears in the display.
External control panel (CI-BUS)
When a command is sent via an external control panel with
CI-BUS, “CI” appears in the display.
The Truma CP plus control panel CI-BUS is the company’s
own variant that is configured only at the factory.

16
Warning
This symbol indicates that an operating parameter has reached
an undefined state. In this case the appliance concerned con-
tinues to operate. As soon as the operating parameter is within
the target range again, this symbol goes off again automatically.
hot
Read out code of warning
– Select icon with rotary push button.
– Tap the rotary push button.
The current warning code will be displayed. The cause of
the warning can be determined and remedied with the aid
of the troubleshooting guide (from page 18 and ff).
hot W = Warning
42 = Fault code
H = Device
H = Heater
A = Air conditioning system
Cause eliminated / return to setting level
– Tap the rotary push button.
Cause not eliminated / return to the setting level
– Press the Back button.
In this case, the warning in the Truma CP plus control
panel has not been acknowledged and the warning
symbol remains. The affected appliance remains in warning
status. Other connected appliances can be operated.
Fault
In the event of a fault, the Truma CP plus control panel im-
mediately jumps to the “Fault” menu level and displays the
fault code of the fault. The cause of the fault can be determined
and remedied with the aid of the troubleshooting guide (from
page 18 and ff).
hot E = Fault
112 = Fault code
H = Device
H = Heater
A = Air conditioning system
Cause eliminated / return to setting level
– Tap the rotary push button.
– The respective appliance is restarted.
This can take several minutes because of internal after-runs
of connected appliances.
If the cause has not been remedied, the fault will occur again
and the control panel will jump to the “Fault” menu level again.
Cause not eliminated, / return to the setting level
– Press the Back button.
In this case, the fault in the Truma CP plus control panel
has not been acknowledged and the warning symbol re-
mains. The appliance remains in fault state. Other connected
appliances can be operated.

17
Technical data
Display LCD, monochrome, with
background lighting
Dimensions (L x W x H) 92 x 103 x 40 mm
Operating temperature range -25°C to +60°C
Storage temperature range -25°C to +70°C
Interfaces
CP plus TIN-Bus
CP plus CI-BUS TIN-Bus, CI-BUS
Power supply 8V – 16.5V
Power consumption max. 65 mA (100 % back-
ground lighting)
6.5 mA – 10 mA (Stand-by)
Standby current 3 mA (Off)
Weight approx. 100g
Subject to technical changes.
Maintenance
The Truma CP plus control panel is maintenance-free. In order
to clean the front panel, use a damp, non-scouring cloth. If
this is not sufficient, use a neutral soap solution.
Disposal
The Truma CP plus control panel must be disposed of in ac-
cordance with the administrative regulations of the respective
country in which it is used. National regulations and laws
(in Germany, for example, the End-of-life Vehicle Regulation)
must be observed.
Declaration of conformity
1. Information about the manufacturer
Name: Truma Gerätetechnik GmbH & Co. KG
Address: Wernher-von-Braun-Str. 12, D-85640 Putzbrunn
2. Appliance identification
Type / model:
Control panel / Truma CPplus, Truma CPplus CI-BUS
3. Complies with the requirements of the following
ECdirectives
3.1 Electromagnetic compatibility 2004/108/EC
3.2 Radio interference suppression of motor vehicles UN ECE R10
3.3 End-of-life vehicle directive 2000/53/EC
3.4 Low Voltage Directive 2006/95/EC
and bears the CE mark and the type approval number
E1 10R-046951
4. Basis of the proof of conformity
EN 61000-6-3:2007 + A1:2011, EN 61000-6-1:2007,
CISPR 22, DIN EN 60335-1
5. Signatory details
Signature: Frank Oster
Managing Director Putzbrunn, 21.01.2015

18
Troubleshooting guide (Combi gas heating system)
Fault code Cause Remedy
# 17 Summer mode with empty water container Switch heater off and allow to cool. Fill boiler with water
# 18 Warm air outlets blocked Check the individual outlet apertures
Circulated air intake blocked Remove the circulated air intake blockage
# 21 Room temperature sensor or cable faulty Inspect the room temperature sensor cable, replace if faulty
Check the resistance of the room temperature sensor.
15 °C – 16.2 kOhm / 20 °C – 12.6 kOhm / 25 °C – 10.0 kOhm
Replace the room temperature sensor if faulty
# 24 Risk of low voltage. Battery voltage is too low < 10.4 V Charge battery
# 29 FrostControl heating element has a short circuit Disconnect heating element plug from electronic control unit. Re-
place heating element
# 42 Open window above cowl (window switch) Close window.
# 43 Overvoltage > 16.4 V Check battery voltage / voltage sources such as the charger
# 44 Low voltage. Battery voltage is too low < 10.0 V Charge battery. If necessary replace old battery
# 45 No 230 V operating voltage Restore 230 V operating voltage
230 V fuse defective Replace 230 V fuse
Overheating protection has been triggered Please contact Truma Service
#112,
#202,
#121,
#211
Gas cylinder or quick-acting valve in the gas supply line
closed
Check gas supply and open valves
Gas pressure regulation system iced up Use regulator heater (EisEx)
Butane content in the gas cylinder too high Use propane. Butane is unsuitable for heating, particularly at temper-
atures lower than 10 °C.
#122,
#212
Combustion air infeed or exhaust outlet is sealed Inspect openings for obstructions (slush, ice, leaves, etc.) and
remove any obstructions
Gas pressure regulation system faulty Inspect / replace gas pressure regulation system
Electronic system faulty Please contact Truma Service
#255 Heater has no 12 V power supply Ensure that the 12V power supply is available
No connection between heater and control panel Make connection between heater and control panel
Control panel cable faulty Contact Truma Service
If these measures do not remedy the fault or if fault codes are displayed that you cannot find in the troubleshoot-
ing guide, contact Truma Service.

19
Troubleshooting guide (Combi Diesel heating system)
Fault code Cause Remedy
# 111 Room temperature sensor or cable faulty Inspect the room temperature sensor cable, replace if faulty
Check the resistance of the room temperature sensor.
15 °C – 16.2 kOhm / 20 °C – 12.6 kOhm / 25 °C – 10.0 kOhm
Replace the room temperature sensor if faulty
# 122 Lack of fuel due to insufficient fuel tank filling, tank has
run empty and / or vehicle is on a slope
Fill tank with fuel. Then fill the fuel line as described in “Initial start-up”
(see Combi Diesel operating instructions).
# 131 No connection between heater and control panel Make connection between heater and control panel
Control panel cable faulty Contact Truma Service
# 132 FrostControl heating element has a short circuit Disconnect heating element plug from electronic control unit.
Replace heating element
# 150 Warm air temperature exceeded:
Not all warm air ducts are connected Check whether the 4 warm air ducts are connected
Warm air outlets blocked Check the individual outlet apertures
Circulated air intake blocked Remove the circulated air intake blockage
# 151 Water temperature exceeded:
Summer mode with empty water container Switch appliance off and allow to cool. Fill boiler with water
# 152 Water temperature exceeded in summer mode Switch appliance off and allow to cool. Fill boiler with water
# 160 Undervoltage < 10.2 V Check battery voltage, charge if necessary.
Short-term immediate measure. Switch off major consumers or
start up the vehicle engine until the heater starts to operate (approx.
4minutes).
Battery capacity inadequate, if necessary exchange old battery
# 161 Overvoltage > 16.4 V Check battery voltage / voltage sources such as the charger
# 162 Open window above cowl (window switch) Close window
# 164 No 230 V operating voltage Restore 230 V operating voltage
230 V fuse defective Replace 230 V fuse
Overheating protection has been triggered Contact Truma Service
# 170 Risk of low voltage < 11.5 V Use the electrical power from the battery sparingly, e.g. restrict lighting
Charge battery
If these measures do not remedy the fault or if fault codes are displayed that you cannot find in the troubleshoot-
ing guide, contact Truma Service.

20
Troubleshooting guide (air conditioning system)
Fault
code
Cause Remedy
# 1 Failure (short circuit or broken cable), room temperature
sensor
Contact Truma Service
# 2 Ice sensor failure – internal Inspect the filter and replace it if necessary
# 4 Ice sensor failure – external (if present) Keep the air inlets / outlets on the roof free of obstructions such as
leaves
# 8 IR receiver unplugged or cable broken Contact Truma Service
If these measures do not remedy the fault or if fault codes are displayed that you cannot find in the troubleshoot-
ing guide, contact Truma Service.